distinct 刪除重復(fù)行 declare @x 申明一個(gè)變量 convert(varchar(20),tscore.tenglish) 類型轉(zhuǎn)換 cast(xx as varchar(10)) 類型轉(zhuǎn)換
www.jb51.net
====================================================== 情況
case
when xxx then xx
when xxxx then xxxxx
else
end ======================================================= while xxx
begin
xxxxxx
end
www.jb51.net
事務(wù)
===================================================
begin tran
declare @sum int = 0
update bank set balance=balance-1000 where cid='0001'
set @sum=@sum+@@error
update bank set balance=balance + 1000 where cid='0002'
set @sum=@sum+@@error if @sum<>0
begin
rollback
print '回滾！'
end
else
begin
--提交事務(wù)
commit tran
print '提交了！'
end
===================================================
begin tran www.jb51.net
begin try
declare @sum int = 0
update bank set balance=balance-900 where cid='0001'
set @sum=@sum+@@error
update bank set balance=balance + 900 where cid='0002'
set @sum=@sum+@@error
commit
end try
begin catch
rollback
end catch
===================================================== declare @halfCount int= ceiling(@count/2.0) 向上 增加時(shí)觸發(fā)器
=========================================
create trigger tri_TblClass_insert_after
on TblClass after insert
as
begin
declare @id int
declare @name varchar(50)
declare @desc varchar(50)
select @id=tclassId,@name=tclassname,@desc=tclassdesc from inserted print @id
print @name
print @desc
end www.jb51.net
========================================= 刪除時(shí)觸發(fā)器
create trigger tri_TblClass_delete_after
on TblClass instead of delete
as
begin insert into TblClassBak
select * from deleted
end
========================================
作者 xhccom

版權(quán)聲明：本站文章來源標(biāo)注為YINGSOO的內(nèi)容版權(quán)均為本站所有，歡迎引用、轉(zhuǎn)載，請(qǐng)保持原文完整并注明來源及原文鏈接。禁止復(fù)制或仿造本網(wǎng)站，禁止在非www.sddonglingsh.com所屬的服務(wù)器上建立鏡像，否則將依法追究法律責(zé)任。本站部分內(nèi)容來源于網(wǎng)友推薦、互聯(lián)網(wǎng)收集整理而來，僅供學(xué)習(xí)參考，不代表本站立場(chǎng)，如有內(nèi)容涉嫌侵權(quán)，請(qǐng)聯(lián)系alex-e#qq.com處理。